Multiscreen display and process for assembling the same

ABSTRACT

Respective unit displays forming a multiscreen display are divided into two halves of a front half cabinet containing a screen part and a rear half cabinet containing a light box part. In using, the rear half cabinet is fixed in a predetermined position in the front half cabinet. In conveying and storing, the rear half cabinet can be contained in the front half cabnet. Further, in fitting the screen, the screen is fixed as pressed against the fitting frame by using wires or the Fresnel lenses forming the screen are fitted to the fitting frames for the respective projecting units.

This is a division of application Ser. No. 08/326,370, filed Oct. 20,1994.

SPECIFICATION BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention relates to a wide-screened multiscreen display made byheaping a plurality of unit displays (called also cube projectiondisplays) in vertical and horizontal directions and a process forassembling the same so that particularly the operations of conveying andheaping the cabinets of respective unit displays, the operations of theadjustment and maintenance after heaping the cabinets may be efficient,the space efficiency in conveying and storing the cabinets may beimproved and the width of the boundary (joint width) between the screensof the respective unit displays may be made small.

2. Description of the Related Arts

Conventional multiscreen displays are of a front surface projecting typewherein an image light from a projecting unit is projected from thefront surface of the screen and a back surface projecting type whereinan image light is projected from the back surface of the screen.However, the back surface type multiscreen display which is low in theinfluence of the surrounding light is generally prevalent. In such backsurface type multiscreen display, the screen is divided vertically andhorizontally to set a plurality of zones so that image lights from aplurality of projecting units may be projected onto the respectiveplurality of zones, individual plurality of images may be therebydisplayed and one image may be displayed as divided into a plurality ofimages.

The conventional multiscreen display can be formed to obtain a screen ofa large picture by arranging a plurality of (9 in the drawing) unitdisplays 1 in the vertical and horizontal directions as shown in FIG.53.

FIG. 54 shows an appearance view of an example of the unit display. FIG.55 shows a vertically sectioned view of the same.

As shown in these figures, the unit display 1 has a screen fitting frame4 arranged on the front surface of a cabinet 2 and is formed bycontaining within the cabinet 2 a screen 3 and light box partsconsisting of optical system parts 5 for projecting an image light ontothe screen 3 on the back surface and a chassis part 6. Connecting metalfixtures 7 and 8 for fixing the respective upper and lower unit displays1 with each other when a plurality of unit displays 1 are heaped up inmultiple steps are fitted on the upper and lower surfaces of the outsideof the cabinet 2. The above mentioned screen 3 is formed of a Fresnellens 3B on the inner surface side and a lenticular lens 3A on the frontsurface side.

FIG. 56 shows an example of the above mentioned unit displays as heapedup in steps. The upper and lower unit displays 1 are connected with eachother through bolts 9 by connecting metal fixtures 7 and 8 arrangedabove and below the cabinets.

When thus installed, in case the unit displays 1 are heaped up so as tobe multiple, the entire cabinet long in the depth will have to be liftedand connected above and below while being fitted in the fixed positionto a danger and heavy labor. Also, the heavy object will have to be slidlittle by little to be fitted toward front, rear, right and left, takinga long time.

Further, in such structure heaped up in steps, the respective unitdisplays will be heaped up by their self-weight in the verticaldirection and therefore the gap of the joint of the vertical sets willbe able to be made small but such gap A as is shown in FIG. 57 will belikely to be produced in the horizontal direction.

For this countermeasure, when a plurality (4 in the drawing) of unitdisplays are heaped up in steps in the vertical and horizontaldirections, for example, as in FIG. 57, if outer peripheral angles 10and 11 are combined to fasten a bolt (indicated by the arrow) fromoutside, it will be difficult to perfectly eliminate the gap A.

Such problem will occur when the weight of the unit display 1 is heavy,its contour is large and the unit display 1 is connected or fastenedfrom outside the cabinet. As a result, the quality of the multi-picturewill be deteriorated.

Further, when the unit displays are heaped up in steps, it will benecessary to work with such machine as a crane. The operation will haveto be large and the internal space of the installing place will have tobe wide.

The depth and contour of the cabinet will be large and the conveyingefficiency will be low. As a multi-picture is made, such many unitdisplays as 4, 9 or 16 units will be conveyed at once and therefore, thevolume of the unit display itself will have to be reduced to elevate theconveying efficiency. (There will be a case that they can not beconveyed at once.)

The operations (such as adjusting the chassis and optical system) afterthe operation of heaping them in steps and the operation (such asreplacing deteriorated internal parts) in the service are all made fromthe back surface side.

When the cabinet is used with a multi-picture for a long time, dust willbe often deposited on the front surface and back surface of the screen.In the case of wiping off this dust, when the depth of the cabinet is asin the past, for example, if the light box part is intended to be pulledout and wiped, it will be hard and inconvenient for the hand to reachthe part.

As in the above, the assembling operation to heap up the unit displaysin steps so as to be of a multi-screen type is dangerous andcomplicated, a wide space is required for the installing place and it isdifficult to get the installing precision. Further, the contour of eachunit display is so large that there are problems that the conveyingefficiency is low and it is inconvenient to operate in the service orthe like.

FIG. 58 shows a formation of another example of the unit display 1. FIG.59 shows a partly sectioned view in line Z--Z in FIG. 58.

In each unit display 1, as shown in FIG. 58, a rear projector 12 isarranged within a cabinet 2, the peripheral edge of a screen 3 ispressed with a screen fitting frame 4 on the front side of the cabinet 2and further the periphery of the screen 3 is pressed with an L-shapedmetal fixture 13. The screen fitting frame 4 is secured so as to beintegral with the cabinet 2.

As shown in FIG. 59, the screen 3 is a Fresnel lens 3B on the backsurface and a lenticular lens 3A on the front surface so that lights maybe once collected by the Fresnel lens 3B and then divided on the rightand left by the lenticular lens. When the screen 3 is dropped into thescreen fitting frame 4 and is pressed against and fixed to the front endpart (receiving part) of the cabinet 2 with the L-shaped metal fixture13, the screen 3 will be fitted. Then, the L-shaped metal fixture 13will be fixed to the screen fitting frame 4 with screws 14 so that thescreen 3 may not be removed.

Now, the above mentioned screen 3 fixing method has the followingdefects (1) to (3):

(1) As the screws 14 are used to fit the L-shaped metal fixture 13 tothe screen fitting frame 4, the thickness L1 of the screen fitting frame4 will require the thickness of the screw part.

(2) Also, as the L-shaped metal fixture 13 holds the screen 3 only onthe outer periphery, in case the screen fitting frame 4 isinstantaneously transformed to be diamond-shaped by such external force(particularly in the diagonal direction) as of conveyance or handling,the screen 3 will be likely to be disengaged out of the L-shaped metalfixture 13. Particularly, the lenticular lens 3A is so considerablythinner than the lenticular lens 3B that the lenticular lens 3A partwill be likely to be disengaged out of the L-shaped metal fixture.Therefore, the dimension L2 of the L-shaped metal fixture 13 must be atleast wider than the dimension L3 of the screen receiving part of thecabinet 2. In order that the screen 3 may not be disengaged out of thescreen fitting frame 4, the dimension L2 of the L-shaped metal fixture13 must be made larger and, at the same time, the dimension L3 on thecabinet 2 side must be set to be as large. Further, the transformationof the central part of the screen 3 is provided with no inhibiting forceand is left free. For example, even if the L-shaped metal fixture 6 isreplaced with a smaller one after the installation in a set place, thedimension L3 on the cabinet 2 side and the dimension L1 on the screenfitting frame 4 side will still remain large and, as a result, when theunit displays are heaped in steps, the effective picture will be small.

From the above, the dimension L4 of the peripheral edge of the screen 3will become very large and, when the unit displays 1 are heaped up inseveral steps as in FIG. 53 to be of a multiscreen type, the width M ofthe joint by the combination will become large, the information amountof the picture will become small and, at the same time, the picture willbecome ugly.

(3) In addition, in the multiscreen, in order to elevate the quality ofthe entire picture, the linearity of the convergence must be adjustedbetween the respective unit displays 1 but there is nor criterion insuch adjustment.

FIG. 60 is a perspective view of another conventional example of themultiscreen display. FIG. 61 is a sectioned view on line Y--Y of FIG.60.

In FIG. 60, a screen 16 is arranged on the front surface of a cabinet 15and a plurality (four in the drawing) of rear projectors 12 are arrangedwithin the cabinet 15. In this formation, as a method of eliminating thejoint of the lenticular lenses, the rear projector 12 and screen 16 areseparately made, only the screen 16 part is made a jointless formationof the lenticular lens and the plurality of rear projectors 12 areseparately combined into a turret so that the optical axes of theFresnel lenses of the screen may be aligned to be a multiscreen.

To concretely explain in FIG. 61, a plurality (four in the drawing) ofthe Fresnel lenses 16B corresponding to the respective rear projectors12 are arranged in the rear of the lenticular lens 16 made one and arefurther lined with a thick strong transparent plate 16C (for example, anacrylic plate) (to function as a supporting plate) in the rear, thethick transparent plate 16C and a shielding plate 16D are jointed andfastened to be integral by inserting the thin shielding plate 16Dbetween the end surfaces of the respective thick transparent plates 16Cand the four Fresnel lenses 16B are held between the above describedlenticular lens 16A and this integral transparent plate 16 to form anintegral screen of a multipicture. Then, the plurality of rearprojectors 12 are arranged as combined in a turret by a separate body 17so that the optical axes of the respective Fresnel lenses 16B may bealigned to make a multiscreen.

However, in the conventional examples in FIGS. 60 and 61, there are thefollowing defects (1) to (3):

(1) The multiscreen is formed of the lenticular lens 16A, Fresnel lens16C and shielding plate. 16D, is complicated and is expensive.

(2) The Fresnel lens 16B is only inserted, is poor in the environmentalstability, slips and deflects. (Therefore, as another countermeasure, apart of the Fresnel lens 16B is nailed to the transparent plate 16C withfine nails so as to be reinforced. However, a deflection (such as anenvironment variation difference by the plate thickness difference) willoccur between the Fresnel lens 16B and transparent plate 16 and thepicture quality will reduce.

(3) Further, as the screen part and the rear projector 12 are separatelyassembled (installed) on the spot (in the setting place), whenmultidisplayed, it will be difficult to precisely align all opticalaxes.

FIG. 62 shows another example of the screen fitting. In this example,one lenticular lens and a plurality of Fresnel lenses are made anintegral screen of a multipicture by using a fitting frame.

In FIG. 62, the reference numeral 20 represents a front surface partunit of a multiscreen display. In this front surface part unit 20, ascreen 30 is fitted by a screen fitting frame 21.

In this screen, four upper, lower, left and right regions 31, 32, 33 and34 are set and image lights are projected from the four respectiveprojecting units.

FIG. 63 is a sectioned view of the front surface part unit 20 in FIG.62.

As shown in FIG. 63, in the screen 30 shown in FIG. 62, Fresnel lenses37 are arranged in the four upper, lower, left and right regions 31, 32,33 and 34 between the thickest transparent plate (such as, for example,an acrylic plate) 35 and the thinnest lenticular lens 36.

The Fresnel lenses 37 weaken the diffusion of the image lights from therespective plurality of the projecting units and lead them to thelenticular lens 36 which forms a vertically striped lens on the frontsurface side of a semitransparent plate, images the image lights fromthe Fresnel lenses 37 and further diffuses them to the right and left. Ablack painting 38 is applied to the periphery of the Fresnel lens 37 toprevent the adjacent projecting units from interfering with lights.

FIG. 64 is an explanatory view for explaining to prevent the projectingunits from interfering with image lights.

In FIG. 64, as lights are absorbed by the black painting 38 between theFresnel lenses 37, when the slip of the image lights from the upper andlower (or right and left) projecting units is little, no interferencewith the image lights by different projecting units will occur. However,as the transparent plate 35 is formed of one plate, as shown by thesolid lines B31 and B32, when the lag of the image lights from theprojecting units is large, the image lights will trespass the blackpainting 38 and an interference will occur. Therefore, the boundary lineof the projected image will have to be controlled by controlling theluster size of the projecting unit and it will be a very difficultcontrol in multiusing some signals different in the frequencycharacteristics as switched.

In case the Fresnel lenses 37 are forcibly fixed to the transparentplate 35 with nails, the ratio of the expansion and contraction and theprogressing velocity will be made different by the plate thicknessdifference between the transparent plate 35 and the Fresnel lenses 37.As a result, a strain will be produced between the transparent plate 35and the Fresnel lenses 37 and therefore this screen will be able to beused only in such place wherein the temperature variation is little as aroom. In addition, as the four Fresnel lenses 37 are fixed into one fromthe first, such handlability as moving, conveying and installing will below. Further, as the transparent plate 35 and screen fitting frame 81have a sufficient strength, they will be heavy and the handlability willbe lower.

SUMMARY OF THE INVENTION

An object of the present invention is to provide a multiscreen displayand a process for assembling the same wherein the conveying operation,installing operation and the adjusting operation and servicing operationafter the installation are made efficient.

Another object of the present invention is to provide a multiscreendisplay wherein the dimensions of the parts for fixing the screen arekept minimum, further the screen holding force is improved, when theunit displays are heaped up in steps, the joint will be made minimum,the information amount of the picture will be made large and theugliness will be able to be reduced, the operability for the linearityadjustment of the convergence can be improved and the assemblingoperability when set is high.

Still another object of the present invention is to provide amultiscreen display wherein, when the slip of the image lights from theprojecting units is large, the interference with the image lights willbe able to be prevented and, in case the picture is made large, thehandlability will be able to be improved.

The first invention is a multiscreen display formed by arranging in thevertical and horizontal directions a predetermined number of unitdisplays containing within cabinets screen parts and light box partsexpanding and projecting image lights to these screen parts, wherein theabove mentioned unit displays are divided into a first part containingthe above mentioned screen parts and a second part containing the abovementioned light box parts and further the above mentioned first part andsecond part are respectively provided with connecting part so as to beconnectable with each other by a locking means.

According to the first invention, as the unit displays are divided intothe first part and second part, the weight and volume will become halfand the conveying operation, installing operation and the adjustingoperation and servicing operation after the installing will be madesafely and easily. Particularly, the first part compoess only a screenpart and other function parts are concentrated in the second part, theassembling operation can be made to eliminate the gap between thescreens in heaping up the cabinets in steps to make a multiscreen withonly the first part and the assembling operation can be made easy.

The second invention is a multiscreen display formed by arranging in thevertical and horizontal directions a predetermined number of unitdisplays containing within cabinets screen parts and light box partsexpanding and projecting image lights to these screen parts,characterized by comprising:

a first cabinet containing the above mentioned screen parts;

a second cabinet containing the above mentioned light box parts, set sothat the contour dimension may be smaller than the inside dimension ofthe above mentioned first cabinet and movable and containable inside theabove mentioned first cabinet;

a plurality of shafts movable forward and rearward with respect to theabove mentioned first cabinet;

a means provided at one end of said shaft to regulate the rearwardmovement;

a fixing means for passing and fixing the other end of the abovementioned shaft to the above mentioned second cabinet;

a guide means removably secured in the rear end part to the rear end ofthe above mentioned second cabinet, guiding the movement of the abovementioned shaft and of a fixed length shorter than the length of theabove mentioned shaft, for fixing in a fixed position the abovementioned second cabinet with respect to the above mentioned firstcabinet; and

a securing means for removably securing the rear end part of this guidemeans to the rear end of the above mentioned second cabinet.

According to the second invention, by using the plurality of shafts andmoving the second cabinet together with the movement of the shaft, thesecond cabinet can be moved and contained inside the first cabinet. Thegreater part of the second cabinet is contained in the space of thefirst cabinet so as to be of a shape and volume convenient to convey andthe number of conveyances can be reduced. The conveying operation,installing operation, adjusting operation and servicing operation can beeasily made. In order that the second cabinet may be pulled out of thefirst cabinet and fixed in a fixed position, such guide means as a pipeis used in addition to the above mentioned plurality of shafts and therear end of this guide means is removably secured to the rear end partof the second cabinet by a securing means. Further, lest the abovementioned second cabinet should be removed out of the fixed position tomove rearward, the second cabinet can be kept in the fixed position byfixing the rear end of the shaft led out rearward by the above mentionedguide means to the above mentioned second cabinet by such fixing meansas a nut.

In the servicing operation or the like, when the fixing of the shaftrear end and the second cabinet is released and the second cabinet isonly pulled out rearward, the shaft regulated in the movement by thefirst cabinet will be smoothly guided along the guide means as securedto the second cabinet and the second cabinet will be able to be smoothlypulled out of the first cabinet.

The third invention is a multiscreen display formed by arranging in thevertical and horizontal directions a predetermined number of unitdisplays made by fixing screens consisting of lenticular lenses andFresnel lenses to screen fixing frames, wherein a plurality of wires arestretched on the front surface side of the above mentioned screen in theabove mentioned unit display, the above mentioned screen is pressedagainst the above mentioned screen fitting frame and further padspressing the peripheral edge of the above mentioned screen are arrangedon the above mentioned screen fitting frame.

According to the third invention, as the plurality of wires arestretched on the front surface side of the screen and the screen isfixed to the screen fixing frame, the screen can be inhibited fromfloating and deflecting and can be positively fixed and further, as theperipheral edge of the screen is pressed by the pads, the screen can befixed more positively.

The multiscreen display according to the fourth invention ischaracterized by comprising a plurality of Fresnel lenses, a pluralityof Fresnel lens fitting frames formed like frames, having the abovementioned plurality of Fresnel lenses respectively fitted on the frontsurface side, having image lights from a plurality of projecting unitsrespectively projected from the back surface side and connected andassembled with each other by a connecting means provided on the sidesurface, a lenticular lens and a lenticular lens fitting frame formedlike a frame, having the above mentioned lenticular lens fitted on thefront surface side and having the above mentioned assembled plurality ofFresnel lens fitting frames inserted from the back surface side.

According to the fourth invention, even when the slip of the imagelights from the projecting units is large, the interference with theimage lights will be able to be prevented by the plurality of Fresnellens fitting frames and, as the plurality of Fresnel lens fitting framesare connected and assembled with each other by the connecting meansprovided on the side surface, in case the picture is made large, thehandlability will be able to be improved.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a unit display in the first embodiment of a multiscreendisplay of the present invention and is a vertically sectioned view asthe rear half is connected to the front half.

FIG. 2 shows the unit display in FIG. 1 and is a vertically sectionedview showing the rear half as contained inside the front half.

FIG. 3 is a view showing an example of the long bolt in FIG. 1.

FIG. 4 shows a unit display in the second embodiment of a multiscreendisplay of the present invention and is a plan view and side viewshowing a formation example in the case that the rear half can becontained in the front half and a light box of a separate body can beput into and out of the movable side.

FIG. 5 is a view showing an example of the long bolt in FIG. 4.

FIG. 6 shows a unit display in the third embodiment of a multiscreendisplay of the present invention and is a plan view and side view of aformation example in which the rear half can be slidably contained inthe front half.

FIG. 7 is a vertically sectioned view showing a locking structure of acabinet and pipe in the rear half part in FIG. 6.

FIG. 8 is a vertically sectioned view showing a locking structure of acabinet in the front half part and a cabinet, pipe and shaft in the rearhalf part in FIG. 6.

FIG. 9 is a vertically sectioned view as the nut is removed from thestate in FIG. 8 and the cabinet in the rear half part is pulled outrearward.

FIG. 10 is a side view of a unit display showing the state in FIG. 9.

FIG. 11 is a side view showing a unit display in FIG. 6 as a cabinet inthe rear half is slid and contained inside a cabinet in the front half.

FIG. 12 is a vertically sectioned view showing an essential part in thestate in FIG. 11.

FIG. 13 is a vertically sectioned view showing the connection when thefront half in FIG. 6 is divided and is heaped up in two steps to form afour-surface multiscreen display.

FIG. 14 is a front view of FIG. 13.

FIG. 15 is a perspective view showing a unit display in the fourthembodiment of a multiscreen display of the present invention.

FIG. 16 is a sectioned view on line X--X in FIG. 15.

FIG. 17 is a sectioned view on line Y--Y in FIG. 15.

FIG. 18 is a sectioned view on line Z--Z in FIG. 15.

FIG. 19 is a sectioned view showing the effect of a pad in theembodiment in FIG. 15.

FIG. 20 is a perspective view showing another embodiment of a pad.

FIG. 21 is a side view showing a multiscreen display assembled so as tomake the joint zero.

FIG. 22 is a side view showing a multiscreen display assembled by usingthe unit displays in FIG. 15.

FIG. 23 is a perspective view showing the unit display in the fifthembodiment of a multiscreen display of the present invention.

FIG. 24 is a sectioned view on line Y--Y in FIG. 23.

FIG. 25 is a sectioned view on line Z--Z in FIG. 23.

FIG. 26 is an explanatory view showing the linearity adjustment of theconvergence in the embodiment in FIG. 23.

FIG. 27 is a perspective view showing the unit display in the sixthembodiment of a multiscreen display of the present invention.

FIG. 28 is a sectioned view on line Y--Y in FIG. 27.

FIG. 29 is a sectioned view on line Z--Z in FIG. 27.

FIG. 30 is a side view showing a multiscreen display assembled by usinga lenticular lens made integral with the unit display in FIG. 27.

FIG. 31 shows a front surface part unit of the seventh embodiment of amultiscreen display of the present invention and is a disassembledperspective view of a Fresnel lens fitting unit and lenticular lensfitting unit.

FIG. 32 is a disassembled perspective view showing the Fresnel lensfitting unit in FIG. 31.

FIG. 33 is a perspective view showing the front surface part in FIG. 31.

FIG. 34 is a sectioned view on line A--A in FIG. 33.

FIG. 35 is a sectioned view showing as magnified a pad and itsperipheral part in FIG. 34.

FIG. 36 is a sectioned view showing the Fresnel lens fitting unit inFIG. 33.

FIG. 37 is a front surface view a Fresnel lens fitting unit showing amodification of the embodiment in FIG. 31.

FIG. 38 is a sectioned view of the Fresnel lens fitting unit in FIG. 37.

FIG. 39 is a sectioned view of an essential part showing the eighthembodiment of a multiscreen display of the present invention.

FIG. 40 is an explanatory view showing the effect of the embodiment inFIG. 39.

FIG. 41 is a sectioned view showing an essential part of a modificationof the embodiment in FIG. 39.

FIG. 42 is a sectioned view showing as assembled a Fresnel lens fittingunit in the modification in FIG. 41.

FIG. 43 is an elevation of a Fresnel lens fitting unit showing the ninthembodiment of a multiscreen display of the present invention.

FIG. 44 is an elevation showing as assembled the Fresnel lens fittingunit in FIG. 43.

FIG. 45 is a sectioned view showing as assembled the Fresnel lensfitting unit in FIG. 43.

FIG. 46 is an elevation of a Fresnel lens fitting unit showing the tenthembodiment of a multiscreen display of the present invention.

FIG. 47 is a sectioned view showing an essential part of the embodimentin FIG. 46.

FIG. 48 is a perspective view showing the 11th embodiment of amultiscreen display of the present invention.

FIG. 49 is a sectioned view showing a wire fitting part in FIG. 48.

FIG. 50 is a perspective view showing the 12th embodiment of amultiscreen display of the present invention.

FIG. 51 is a sectioned view on line B--B of a lenticular lens in FIG.50.

FIG. 52 is a side view showing the 13th embodiment of a multiscreendisplay of the present invention.

FIG. 53 is a perspective view showing a conventional multiscreendisplay.

FIG. 54 is an appearance view showing an example of unit display.

FIG. 55 is a vertically sectioned view of FIG. 54.

FIG. 56 is a side view of unit displays as heaped in steps.

FIG. 57 is a view explaining the problem when unit displays are heapedup in steps.

FIG. 58 is a perspective view showing another formation of aconventional unit display.

FIG. 59 is a partly sectioned view on line Z--Z in FIG. 58.

FIG. 60 is a perspective view of a multiscreen display of anotherconventional example.

FIG. 61 is a sectioned view on line Y--Y in FIG. 60.

FIG. 62 is a side view showing the front surface part of a conventionalmultiscreen display.

FIG. 63 is a sectioned view of a front surface part of FIG. 62.

FIG. 64 is an explanatory view explaining the prevention of theinterference with image lights of the multiscreen display in FIG. 63.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The embodiments shall be explained with reference to the drawings.

FIG. 1 shows a unit display in the first embodiment of a multiscreendisplay of the present invention and is a vertically sectioned view asthe rear half is connected to the front half.

FIG. 2 is a vertically sectioned view showing as the rear half iscontained inside the front half.

In FIG. 1, a unit display 50 is formed as divided into the front half50A and rear half 50B. In the front half 50A, only a screen 52 iscombined in a cabinet 51 of the front half and a connecting part 55 forconnecting with the rear half 50B is provided on the inner periphery ofthe rear end part of the cabinet 51. On the other hand, in the rear half50B, such image projecting parts as optical system parts 57 and chassisparts 58 are combined in a cabinet 56 in the rear half and aflange-shaped connecting part and stopper 67 for connecting with thefront half 50A is provided on the outer periphery of the front end partof the cabinet 56. A left part 60 is arranged on the lower surface ofthe front half 50A.

Here, the rear inner dimension L, of the front half 50A is set to belarger than the outer dimension L_(z) of the rear (greater part) of therear half 50B. In the case of such moving as conveying, as shown in FIG.2, the rear half 50B will be able to be contained within the front half50A. Therefore, the above mentioned flange-shaped connecting part andstop per 67 enters the inside of the front half 50A and the rear half50B is made movable forward and rearward. From the contained state inFIG. 2, when the rear end part of the rear half 50B is pulled out of thefront half 50A, the flange-shaped connecting part and stopper 67 of therear half 50B comes into contact with the connecting part 55 of thefront half 50A and, in this contact state, the connecting part 55 andthe flange-shaped connecting part and stopper 67 are connected and fixedthrough a long bolt 69, the state in FIG. 1 will be made. Flange parts68 are arranged on the upper and lower surfaces of the rear end part ofthe rear half 50B and such long bolt 69 as is shown in FIG. 3 isinserted through the above mentioned connecting parts 55 and 67 fromthis flange part 68 so as to be fixed.

The connecting bolt 69 is removed from the front half 50A and rear half50B integrally connected through the connecting bolt 69 and the rearhalf 50B is moved as shown by the arrow in FIG. 1 and is containedwithin the front half 50A so that the state in FIG. 2 may be made fromthe state in FIG. 1.

FIG. 4 shows a unit display in the second embodiment of a unit displayof the present invention. (a) represents a plan view and (b) representsa side view. A separate light box 70 is formed in the rear half 50Bwhich is a movable side so as to be able to be freely put into and outof the front half (screen part) 50A which is a fixed side. So that theabove mentioned rear half 50B may be fixed in a fixed position withrespect to the above mentioned front half 50A, flange parts 71 areprovided in the front end part of the cabinet 56 of the above mentionedrear half 50B so as to project outside as shown in FIG. 4(a), nuts 74are embedded in the flange parts 71, flange parts 80 are provided on theinner surface of the rear end part of the above mentioned front half 50Aso as to project inside as shown in FIG. 4(b), through holes of the samediameter as the inside diameter of the nut are provided in the positionscorresponding to the positions of the nuts 74 of the flange parts 80,further a flange part 72 is provided on the outer periphery of the rearend part of the above mentioned rear half 50B so as to project outsideand a through hole (of a diameter larger than the above mentioned nutdiameter) through which the large diameter part of the long bolt 73 willpass is provided in the flange part 72. The above mentioned long bolt 73is screw-threaded at the tip as shown in FIG. 5, is of a large diameterin the part other than the screw thread part and is of a stepped shape.

In order that the above mentioned rear half 50B may be fixed in apredetermined position with respect to the above mentioned front half50A, when the above mentioned rear half 50B is pulled out to themaximum, the above mentioned flange parts 71 will come into contact withthe above mentioned flange parts 80 and the above mentioned rear half50B will be regulated not to move rearward from the predeterminedposition. When the above mentioned long bolts 73 are passed through thethrough holes of the flange part 72 in the rear of the above mentionedrear half 50B from the back surface side, are further passed through thethrough holes of the rear flange parts 80 of the above mentioned fronthalf 50A and are at last screwed with the nuts 74 of the front flangeparts 71, the step parts of the above mentioned bolts 73 will stop onthe rear end surface of the above mentioned front half 50A, the flangeparts 80 at the rear end of the above mentioned front half 50A will befastened with the screw parts at the tips of the above mentioned bolts73 and the above mentioned nuts 74 screwed to the screw parts and theabove mentioned front half 50A and rear half 50B will be positivelyconnected and fixed. By the way, at the time of a maintenance service,when the light box 70 is taken out of the cabinet 56, parts will be ableto be replaced. The reference numerals 60 and 61 represent leg parts.

By the way, in the embodiment in FIG. 4, the case that the light box 70is separate has been explained. However, this embodiment can be appliedalso to the case of a structure in which the cabinet 56 issimultaneously the light box.

FIG. 6 shows a unit display in the third embodiment of a multiscreendisplay of the present invention and shows a formation example of a unitdisplay in which the rear half can be contained in the front half sothat the loaded volume as to be conveyed may be reduced. (a) representsa plan view and (b) represent a side view. The same elements as in FIG.1 shall be explained with the same reference numerals attached.

In FIG. 6, the rear half 50B containing light box parts comprisingoptical system parts 57 and chassis parts 58 within the cabinet 56 isformed so as to be able to be slidably contained into or pulled out ofthe inside of the front half 50A containing the screen 52 within thecabinet 51 by using a plurality (4 in the drawing) of shafts. Theoptical system parts 57 and chassis parts 58 are mounted within thecabinet 56 of the rear half 50B. FIGS. 6(a) and (b) show the rear half50B as pulled out to a predetermined position in the rear. In thisposition, the optical system parts 57 are set in the projecting positionoptically optimum to the screen 52.

As shown in FIG. 6(b), a flange part 80 is provided to project inside onthe inner surface of the rear end part of the front half 50A and aflange part 81 is provided to project outside on the outer periphery ofthe rear end part of the rear half 50B. Four shafts 83 are arrangedthrough the flange parts 80 and 81. A common stopper 82 is secured toone end part (front end part through the flange part 80) of each of thetwo upper and lower shafts 83. The other end parts of the shafts 83 arepassed through the flange part 81 through pipes 86 as guide means andare fixed to this flange part 81 by such fixing means 90 as nuts. Thefront end of the pipe 86 as a guide means is in contact with the rearend part of the cabinet 51 of the front half part 50A and the rear endof the pipe 86 is secured to the rear end part of the flange part 81 ofthe cabinet 56 of the rear half part 50B by later described securingmeans. This securing means shall be explained in FIGS. 7 to 9. Thedetails of the locking structure of the shaft 83, pipe 86 and flangeparts 80 and 81 in the predetermined position shown in FIG. 6 shall bedescribed with reference to FIG. 8.

FIG. 7 is a vertically sectioned view showing a means for securing therear end of the above mentioned pipe 86 to the rear end part of theflange part 81 of the cabinet 56 of the rear half part 50B. In order toimprove the workability in assembling, the above described pipe 86,fixing metal fixture 87 and fixing screw 88 are made integral.

In FIG. 7, first of all, a flanged bolt (male screw) 100 is fixed to therear end of the pipe 86 by such means as calking. On the other hand, anut (female screw) 101 screwing with the above mentioned bolt 100 isfitted to the flange part 81 of the cabinet 56 of the rear half part bysuch means as welding. Here, the inside diameter of the pipe 86 is madesomewhat larger than the outside diameter of the later described shaft83 and a bushing 85 fitted to the outside diameter of this pipe 86 isfitted to the flange part 81 of the cabinet 56.

FIG. 8 is a sectioned view showing the details of a locking structure ofthe shaft 83 and flange parts 80 and 81 in FIG. 6(b).

As shown in FIG. 8, the shaft 83 and stopper 82 are connected and fixedby welding or the like. A bushing 84 fitted to the shaft diameter isfitted to the flange part 80 in the rear of the cabinet 51 of the fronthalf 50A. When the shaft 83 is inserted into this bushing 84, the shaft83 will become smoothly movable forward and rearward. When the cabinet56 of the rear half 50B is in a predetermined position (fixed distance:an optically normal position) with respect to the cabinet 51 of thefront half 50A, the shaft 83 will be able to be projected rearward untilthe stopper 82 fixed to the shaft 83 collides with the flange part 80 inthe rear of the cabinet 51 of the front half.

Then, the cabinet 56 of the rear half is placed in a predeterminedposition with the cabinet 51 of the front half so that, when the shaft83 is inserted into the pipe 86, the rear end of this shaft may projectby a dimension L out of the pipe length and a screw thread somewhatlonger than this dimension L is formed at the rear end of the shaft 83.After the shaft 83 is inserted into the pipe 86 from the rear of theflange part 81, the flanged bolt 100 secured to the shaft 83 is screwedto the nut 101 fixed to the flange part 81 and thereby the pipe 86 isconnected and fixed to the flange part 81 in the rear of the cabinet 56.At last, the nut 90 is screwed to the shaft 83. When the fastening iscompleted, the flange part of the flanged bolt 100 will be fastened soas to be pressed by the nut 90. At the same time, At the same time, theshaft 83 itself will be pulled out rearward and fixed by the fasteningof the nut 90. (That is to say, the flange part 80 in the rear of thecabinet 51 of the front half will be held and fixed by the stopper 82and the front end of the pipe 86.) Therefore, as a result, the flangepart 80 in the rear of the cabinet 51 of the front half and the flangepart 81 in the rear of the cabinet 56 of the rear half will be alwaysable to keep a predetermined position corresponding to the pipe length.

In the above structure, the operation procedures of "inserting the pipe86→fastening the flanged bolt 100→fastening the nut 90" are only carriedout all from the back surface side of the cabinet, therefore, even afterthe cabinets are heaped in steps, after the cabinet 56 in the rear halfis pulled rearward out of the contained state (the state in FIG. 11),the cabinet will be able to be set in the normal position all by theoperations from the back surface side.

As the flanged bolt 100 is secured to the rear end of the pipe 86, thereare advantages that the assembling operation will be simple and thenumber of the component parts will be few.

Further, as an additional effect, as the pipe 86 and the cabinet 56 inthe rear half part are made integral by the screwed connection of thebolt 100 and nut 101, when the cabinet 56 of the rear half part ispulled out in a maintenance service, even if the nut 90 is removed fromthe rear end of the shaft 3 and the cabinet 56 is pulled out rearward,as shown in FIG. 9, the pipe 86 will remain connected and fixed to theflange part 81 of the cabinet 56, even if the cabinet 56 is pulled outfurther rearward, the shaft 83 will remain locked within the pipe 86and, by the rigidity of the pipe 86, as shown in FIG. 10, the front endof the cabinet 56 pulled out will only incline but will not touch thefloor and the cabinet 56 will be able to be smoothly pulled out with thepipe 86 as a guide.

When conveyed or the like, the cabinet 56 will be able to be moved andcontained within the cabinet 51.

FIG. 11 is a side view showing the rear half 50B as slid and containedinside the front half 50A. FIG. 12 is a vertically sectioned viewshowing an essential part in the state in FIG. 11.

In order to thus move and contain the cabinet, as in FIG. 6(b), the nut90 is removed from the fixed state in the predetermined position,further the connection of the flanged bolt 100 at the rear end of thepipe 86 and the nut 101 fixed to the flanged part 81 is disconnected,the pipe 86 is pulled out, then the nut 90 is fitted again to the rearend of the shaft 83 and the cabinet 56 may be moved to be pushed intothe cabinet 51.

When the cabinet is delivered after the production, when it is conveyedin contained state as shown in FIG. 11 to an installing place, it willbe arranged in a predetermined place and then the cabinet 56 of the rearhalf part will be pulled out of the cabinet 51 of the front half partand, when the stopper 82 comes into contact with the front end of theflange part 80 as regulated, the nut 90 will be removed from the rearend of the shaft 83, the pipe 86 will be inserted from the rear of theflange part 86 so as to be inserted through the pipe, the flanged bolt100 at the rear end of the pipe 86 will be connected and secured to thenut 101 fixed to the flange part 81 and then the nut 90 will be againscrewed to the rear end of the shaft 83 so that the cabinet 56 of therear half part may be fixed in the predetermined position as shown inFIG. 6(b).

FIG. 13 is a vertically sectioned view showing a connected state when afour-face multiscreen display is formed by heaping in two steps thefront halves of the unit displays shown in the embodiment in FIG. 6.FIG. 14 is an elevation of the same.

As shown in these drawings, the front half 50A of the unit display 50 onthe lower step is connected and fixed to a base 110 on the floor by suchlocking means as bolts 111 through through holes 54 on the bottomsurface. Then, the front half 50A of the unit display 50 on the upperstep is mounted and the unit displays 50 are connected and fixed bypassing the bolts 111 through the through holes 54 on the bottom surfaceof the front half 50A on the upper step and the through holes 54 on theupper half 50A on the lower step.

Further, as shown in FIG. 14, the front halves 50A of the unit displays50 in the horizontal direction of the four-face multiscreen display areconnected and fixed by passing the bolts 111 through the through holes53 on the respective sides of the front halves 50A of the respectiveunit displays 50. Thus, all the four heaped unit displays and the base110 are firmly connected and fixed into a four-face multiscreen displayas if integrally, the gap A which has been a problem in the conventionalexample (FIG. 57) between the unit displays 50 can be eliminated and theangle or the like for rectifying the outer periphery becomesunnecessary.

As in the above, after the screen part for the multipicture is formed byheaping up only the front halves 50A of the unit displays 50, the rearhalves 50B are connected and fixed to the front halves 50A of therespective unit displays 50 by means of the above described shafts orthe like to complete the inherent unit displays 50.

According to the above described embodiments in FIGS. 1 to 14, when theunit display which is a component of a multiscreen display is dividedinto two parts of a first part containing screen parts and a second partcontaining optical system parts and chassis part, the weight and volumeof each part will become half and the conveying operation, installingoperation and the adjusting operation and servicing operation after theinstallation will become safe and easy. Particularly, according to theembodiments in FIGS. 6 to 14, in making a multiscreen (heaping insteps), first, the first part containing the screen parts is assembled,the respective first parts can be easily connected in the verticaldirection and horizontal direction and the joints can be almosteliminated.

Also, according to the embodiments in FIGS. 1 to 12, when the secondpart is contained in the first part, in the conveyance and storage, theloading efficiency can be elevated and the space can be reduced.Particularly, according to the embodiments in FIGS. 6 to 12, ininstalling, as the second cabinet is set in a predetermined positionwith respect to the first cabinet, such guide means as pipes can beeasily fitted and therefore, in the case of assembling the cabinets in apredetermined position and separating the second cabinet from the firstcabinet, the operations will be easy and the number of parts will bereduced.

FIG. 15 is a perspective view showing a unit display in the fourthembodiment of a multiscreen display of the present invention. FIG. 16 isa sectioned view on line X--X in FIG. 15. FIG. 17 is a sectioned view online Y--Y in FIG. 15. FIG. 18 is a sectioned view on line Z--Z in FIG.15.

In FIG. 15, in a unit spray 120, a rear projector 122 is arranged isarranged within a cabinet 121, a screen fitting frame 123 is integrallyprovided on the front side of the cabinet 121, a screen 126 is fitted tothis screen fitting frame 123, a plurality (three in the drawing) ofwires 127 are stretched in the vertical direction on the surface of thescreen 126, the screen 126 is pressed against the screen fitting frame123 and the peripheral edge of the screen 126 is pressed with pads 124and 125.

As shown in FIG. 16, the screen 126 is a Fresnel lens 126A on the backsurface and a lenticular lens 126B on the front surface. Lights are oncecollected by the Fresnel lens 126 and are divided on the light and leftby the lenticular lens 126B. The screen fitting frame 123 is formed of ascreen side part 123A having a thin part and a thick rear side part 123Band is secured so as to be integral with the part of the cabinet 121.

In fitting the screen 126, as shown in FIG. 17, a plurality (in thedrawing, respectively three on the upper surface and lower surface ofthe screen fitting frame 123) of through holes 123b are provided nearthe screen in the screen fitting frame 123, the end part of a wire 127is passed through the upper and lower holes 123b, the wire 127 is pulledwith a fixing screw 130 in the thick part on the rear side of the screenfitting frame 123 and the screen 126 is pressed in between the wire andthe front end part (receiving part) of the screen fitting frame 123.

The wire 127 is thinner than the vertical groove width of the lenticularlens 126B and is stretched in the vertical groove of the lenticular lens126 as shown in FIG. 18 and therefore the screen 126 will be preventedfrom lagging in the horizontal direction.

The peripheral edge of the screen 126 is pressed in with pads 124 and125. Two sets of the pads 124 are arranged so as to be positioned amongthree wires 127. The pad 124 is provided with a locking piece 124 forlocking the upper and lower ends of the front surface of the screen 126and is screwed and fixed to the screen fixing frame 123 with screws 128as shown in FIG. 16. The pad 125 is screwed and fixed to the screenfitting frame 123 with screws 129 as shown in FIG. 18 so as to press theright and left ends of the periphery of the screen 126. The pad 125 hasno locking piece and a set of them is arranged on the right and left ofthe screen fitting frame.

Though the right and left pads 125 have no locking piece, as shown inFIG. 18, the wires 127 are arranged on the front surface of the screenfitting frame 123 and the screen 126 is pressed by the screen fittingframe 123 and wires 127 in a sandwich form. Therefore, a forcesufficient to suppress the screen 126 deflecting direction will bedeveloped and there will be no problem. As the locking part is thusunnecessary for the pad 125, the joint of the multiscreen formed byarranging unit displays will be extremely small and the thickness of thepad 125 only will do.

When the pad 124 is of a selected material and thickness having a springeffect and is fixed to the screen fitting frame 123 with the screws 128,a spring effect will be produced in the tip part supporting the screenend and therefore, as shown in FIG. 19, even if the screen 126 thermallyexpands (as shown by the dotted line), only the pad 124 will betransformed, no stress will be generated within the screen and thescreen 126 will be able to be maintained. That is to say, even if astrain is generated by heat in the screen 126 and the screen 126 istransformed to be diamond-shaped, a stress escaping from the screenfitting frame 123 will act strongly. This is the same also on the pad125.

Particularly, on the pad 124, during the conveyance by a truck or thelike, even if the interior becomes high in the temperature, no stresswill be given to the screen 126. Even against the expansion and lag ofthe screen 125, such pressing space L11 of the locking part 124a as isshown in FIG. 16 will be always maintained and therefore, even if animpact load is applied from outside during the conveyance, the screenend will be able to be positively held.

The above mentioned wire 127 has effects of preventing the upper andlower ends of the screen 126 from floating and preventing the centralpart of the screen 126 from being transformed. For example, during theconveyance or handling, even if a diamond-shaped transformation isinstantaneously produced in the diagonal direction of the screen 126, asthe swelling and depression of the screen 126 are prevented by the wires127, the screen end will not easily protrude out of the pressing spaceL11 of the locking piece 124a of the pad 124.

Thus, as the screen 126 is pressed in against the receiving part of thescreen fitting frame 123 by the plurality of wires 127 and the pads 124and 125. The dimension L13 of the receiving part of the screen fittingframe 123 shown in FIG. 2 can be designed to be smaller than before.

By the way, the pad 124 may not have such locking pieces 124a as in FIG.15 but may have such locking pawls 124b as are shown in FIG. 20.

On the other hand, in the conventional example, in case the unitdisplays 1 are heaped up in multisteps as shown in FIG. 21, the jointwill be so wide that such structure that the gap M between the heapedunit displays may be zero will be often made. In such case, during theexhibition or the like, when the temperature of the screen surface riseswith the temperature rise within the unit display 1, the thermalexpansion of only the screen part will become large, the screen will berather transformed by the increase of the dimension and, as a result,the quality of the picture will reduce. That is to say, there will be noescape from the thermal expansion of the screen.

However, in the embodiment of the present invention, as shown in FIG.16, a step difference 123a (of a dimension L12) is provided in thefixing part of the pad 124 and the thick part of the screen fittingframe and therefore, even if the screen dimension is expanded and thepad 124 is transformed by the thermal expansion as described above, asthere is an escape, the screen surface will be able to be held withoutgenerating a warp.

As the joint in this embodiment is designed by such small dimensions asthe dimension L11 of the locking piece 124a of the pad 124 in thevertical direction and only the thickness of the pad 125 in thehorizontal direction, when the unit displays are heaped in multisteps,even if the step difference L12 is included in the joint between theunit displays, as compared with the conventional example, as shown inFIG. 22, the joint M will be able to be made far smaller.

According to the above described embodiment in FIG. 15, the jointbetween the unit displays can be controlled to be extremely minimum. Thescreen can be always positively held against the dimension variation bythe thermal expansion coefficient difference between the screen itselfand the frame and no strain is given to the screen itself.

By the way, as another embodiment relating to the embodiment in FIG. 15,in conveying the unit display 120, the screen 126 is pressed against thescreen fitting frame 123 with a plurality of wires 127 and theperipheral edge of the screen is pressed with the pad 124 having thelocking pieces 124a or locking pawls 124b (See FIG. 20) and, ininstalling it, after the respective unit displays 120 are set as heapedin a plurality of steps, the above mentioned wire 127 may be cut off andremoved. Thereby, after the installation, even when a projected image isseen on the screen 126, the wires 127 will not be in the way at all.Even after the wire 127 is cut off, the screen 126 will be pressedagainst the screen fitting frame 123 by the locking pieces 124a orlocking pawls 124b of the pad and therefore will not be disengaged.

FIG. 23 is a perspective view showing a unit display in the fifthembodiment of a unit display of the present invention. FIG. 24 is asectioned view on line Y--Y in FIG. 23. FIG. 25 is a sectioned view online Z--Z in FIG. 23. The same elements as in FIG. 15 shall be explainedby attaching the same reference numerals.

In the embodiment in FIG. 23, in addition to the wire 127 in thevertical direction on the screen 126 shown in the embodiment in FIG. 15,one wire 131 is added in the horizontal direction on the screen 126.

Concretely, the difference from the embodiment in FIG. 15 is that thepad 125 arranged on each of the right and left surfaces of the screenfitting frame 123 is divided into two pads, a pair of right and leftthrough holes 123c are provided in the positions between these two pads125 and a wire 131 is passed through these holes 123c and is stretchedin the horizontal direction. The other formations are the same as inFIG. 15.

Therefore, in the vertical direction, the same as in the embodiment inFIG. 15, three wires 127 are stretched so as to be along the verticalgroove of the lenticular lens 126B. The structures of stretching thewires 127 and 131 in the vertical and horizontal directions are similarto each other as shown in FIGS. 24 and 25. As shown in FIG. 24, the wire127 in the vertical direction is the same as in the above described FIG.17. As shown in FIG. 25, the wise 131 in the horizontal direction passeson the surface of the lenticular lens 126B of the screen 123, passesthrough the hole 123c provided in the screen fitting frame 123 and islocked to the fixing screw 132 on the inner surface of the screenfitting frame 123.

According to the above mentioned formation, in addition to the threewires 127 in the vertical direction, one wire 131 is added to the centerin the horizontal direction, the swell of the screen 126 is pressed inby the wire tension in both vertical and horizontal directions and thescreen holding force can be improved. Thereby, the dimension L11 of thelocking piece 124 for preventing the floating of the upper and lowerends of the screen 126 can be made further smaller. That is to say, inorder to stretch the wires 127 and 131 in a cruciform, a twofold effectwill be developed to prevent the bending of the screen 126.

The wire 131 provided in the horizontal direction passes through thecenter of the screen 126, is made horizontal so as to be stretched in acruciform with the wire 127 in the center of the screen in the verticaldirection and is also a criterion of adjusting the linearity ofconvergence.

Such video image of a cruciform pattern or grid pattern as is shown inFIG. 26 is displayed on the screen 26 to adjust the linearity ofconvergence. At this time, the position of the cruciform pattern or gridpattern may be adjusted to coincide with the center of the cruciformwires.

According to the above described embodiment in FIG. 23, in case amultiscreen is made by heaping unit displays in steps, the joint betweenthe unit displays will be able to be controlled to be very small. Thecriterion of adjusting the linearity of convergence can be made also bythe cruciform wires.

By the way, as another embodiment relating to the embodiment in FIG. 23,in conveying the unit display 120, the screen 126 is pressed against thescreen fitting frame 123 with a plurality of wires 127 and 131 and theperipheral end of the screen is pressed with the pad 124 having thelocking pieces 124a or locking pawls 124b (See FIG. 20). In fitting,respective unit displays 120 are set as heaped in a plurality of stepsor further the convergence is adjusted and then the above mentionedwires 127 and 131 may be cut off and removed. Thereby, after theinstallation, when the projected picture on the screen 126 is seen, thewires 127 and 131 will not be in the way at all. Further, even after thewires 127 and 131 are cut off, the screen 126 will be pressed againstthe screen fitting frame 123 by the locking pieces 124a or locking pawl124b and will not be disengaged.

FIG. 27 is a perspective view showing the unit display in the sixthembodiment of a unit display of the present invention. FIG. 28 is asectioned view on line Y--Y in FIG. 27. FIG. 29 is a sectioned view online Z--Z in FIG. 27. FIG. 30 is a side view of a multiscreen as made byheaping in steps the unit displays in FIG. 27. The same elements as inFIG. 15 shall be explained by attaching the same reference numerals.

The difference of the embodiment in FIG. 27 from the embodiment in FIG.15 is that only the Fresnel lens 126A of the screen (formed of the twolenses of a lenticular lens and Fresnel lens) is fixed to the screenfitting frame 123 with a plurality (three in the drawing) of wires 127thinner than the vertical groove width of the lenticular lens and thepads 124 and 125 pressing the outer peripheral end surface of theFresnel lens 126A. As shown in FIG. 14, the wire 127 passes on thesurface of the Fresnel lens 126A having a spiral groove, passes througha through hole 123c provided in the screw fitting frame 123 and islocked to a fixing screw 130 on the inner surface of the screen fittingframe 123. The pad 124 used here is different from that in theembodiment in FIG. 15 and has no locking piece 124 for locking the upperand lower ends of the screen. Therefore, the pads 124 and 125 have nolocking part covering the screen surface and, when the unit displays120A are heaped up in steps, the joint will be able to be furtherreduced.

In making a multiscreen by heaping a plurality of unit displays 120Ahaving the Fresnel lenses 126A (shown in FIG. 27) incorporated, thelenticular lens 126B made one is arranged adjacently to the Fresnel lens126A on the front surface of the plurality (four in the drawing) of theheaped unit displays 120A as shown in FIG. 30 so that a screen formed ofthe two lenses of the inherent lenticular lens and Fresnel lens may bemade.

The pads 124 and 125 have also the same function as of the shieldingplate of the conventional example. The plurality of fixing wires 127 arethinner than vertical groove width of the lenticular lens 126B andtherefore will be mixed into the vertical groove of the lenticular lens126B and will not be substantially conspicuous at an optimum sightingdistance particularly when the picture is made large by the multiscreenor the like.

Further, when no image is projected by the projector. 122, these wires127 and the pads 124 and 125 will hide behind the lenticular lens 126Bmade one and will be seen only as one screen.

By the way, when the wire fixing the Fresnel lens 126 are stretched inthe horizontal direction and so as to pass through the center of theFresnel lens 126A, a cruciform will be formed in the above describedvertical direction and with the wire 127 passing through the center ofthe Fresnel lens and will be able to be used as a criterion foradjusting the linearity of convergence.

According to the above described embodiment in FIG. 27, when amultiscreen is made by heaping in multisteps the unit displays 120Ahaving only the Fresnel lenses 126A arranged on the front surfaces, thejoint between the respective unit displays 120A will be able to becompletely hidden. That is to say, as compared with the conventionalexamples in FIGS. 60 and 61, in this embodiment, a multiscreen can bemade as combined with the lenticular lens 126B made one while securing astructure easy to handle and install the unit displays 120A.

According to the above described embodiments in FIGS. 15 to 30, thedimensions of the parts for fixing the screen can be kept minimum,further the screen holding force can be improved, the joint when theunit displays are heaped in steps can be minimized, the informationamount of the picture can be made large, the ugliness can be reduced,the operability for adjusting the linearity of convergence can beimproved and a multiscreen display high in the assemblability in settingcan be provided.

FIG. 31 is a disassembled perspective view of a Fresnel lens fittingunit and lenticular lens fitting unit, showing the front surface partunit of the seventh embodiment of a multiscreen display of the presentinvention.

In FIG. 31, the reference numeral 201 represents a front surface partunit of a multiscreen display of a multiscreen system. In this frontsurface part unit 201, four Fresnel lens fitting units 210 are assembledas arranged in two vertical rows and two horizontal rows and alenticular lens fitting unit 230 is fitted on the front surface sides ofthe assembled Fresnel lens fitting units 210.

The Fresnel lens fitting unit 210 is fitted with the Fresnel lens 214 onthe front surface side of the Fresnel lens fitting frame 211 by theupper and lower pads 212 and right and left pads 213. Four projectingunits are arranged on the back surface sides of four Fresnel lensfitting frames 211 so that the lights from the four projecting units maybe respectively projected from the back surface side. Two bolt fixingthrough holes 215 are formed on each of the upper, lower, right-and leftside surfaces of the Fresnel lens fitting frame 211.

The lenticular lens fitting unit 230 is fitted with the lenticular lens233 through a reinforcing piece 232 formed to be frame-shaped of suchmaterial having a high strength and some degree of resiliency as hardplastics on the front surface side of the lenticular lens fitting frame231. Four bolt fixing through holes 234 are formed in the positionscorresponding to the through holes 215 of the above mentioned Fresnellens fitting frame 211 on each of the upper, lower, right and left sidesurfaces of the lenticular lens fitting frame 231. This front surfacepart unit 201 forms one multiscreen of such Fresnel lens fitting units210 and lenticular lens fitting unit 230.

FIG. 32 is a disassembled perspective view showing the Fresnel lensfitting unit 210 in FIG. 31.

The Fresnel lens fitting frame 211 of the Fresnel lens fitting unit 210is formed to be frame-shaped of such high strength material as analuminum alloy and has a Fresnel lens fitting part 216 formed on thefront surface side. The Fresnel lens fitting frame is formed to besmaller in the diameter by the thickness of the pads 212 and 213 thanthe outer periphery of the Fresnel lens fitting frame 211. A groove part217 is formed on the back surface side of the Fresnel lens fitting part216 and has five screw holes 218 formed at regular intervals on eachsurface.

The pad 212 has a locking piece 219 for locking the Fresnel lens plate214 formed on the front surface side by bending a metal plate to bechannel-shaped and has a screw fixing part 220 formed by bending theback surface side to be L-shaped toward the back surface. This screwfixing part 220 has through holes 221 formed in the positionscorresponding to the screw holes 218 of the above mentioned groove part217. The screw fixing part 220 will be fitted and fixed to the abovementioned groove part 217 when screws 222 are inserted into the throughholes and are screwed into the screw holes 218. The pad 213 is of thesame structure as of the pad 212 except that only the length isdifferent.

FIG. 33 is a perspective view showing the front surface part in FIG. 31.

In FIG. 33, when the Fresnel lens fitting units 210 assembled in twovertical rows and two horizontal rows are inserted from the back surfaceside, the lenticular lens fitting unit 230 will be fitted to the Fresnellens fitting units 210 assembled with bolts 235 so that the Fresnel lens214 may be arranged on the back surface side of the lenticular lens 233.

FIG. 34 is a sectioned view on line A--A in FIG. 33. As shown in thisdrawing, the lenticular lens fitting frame 231 of the lenticular lensfitting unit 230 is formed to be L-shaped with the front surface sidedirected outside and a reinforcing piece 232 is screwed and fixed byscrews 236 in this part. The lenticular lens 233 is fitted by bonding onthe front surface side of the reinforcing piece 232. The bolt 235 isinserted through the through hole 234 of the lenticular lens fittingframe 231 and through the through hole 215 of the Fresnel lens fittingframe 211 and is screwed into a nut 237 to fix the lenticular lensfitting frame 231 and Fresnel lens fitting frame 211. In this state, thelocking piece 219 of the pad 212 locking the Fresnel lens 214 will be incontact with the back surface side of the lenticular lens 233.

FIG. 35 is a sectioned view showing the pad and its peripheral part inFIG. 34 as magnified.

The pad 212 has a resiliency. In case the Fresnel lens 214 expands tothe state of the broken line from the state of the solid line due to thetemperature rise, the pad 212 will bend outside to apply an insidedirected force to the Fresnel lens 214. Here, the outer periphery of theFresnel lens fitting part 216 and the outer periphery of the Fresnellens 214 are set so as to coincide with each other at about -20 degreesbelow the freezing point which is a lower limit of the generalatmospheric temperature. Therefore, at the normal temperature, the pad212 will always apply an inside directed force to the Fresnel lens 214.

FIG. 36 is a sectioned view showing the Fresnel lens fitting unit 210 asassembled.

When the Fresnel lens fitting units 210 are as assembled, the throughholes 215 of the adjacent Fresnel lens fitting frames 211 willcommunicate with each other. The bolt 238 will be inserted through suchcommunicating through holes 215 and screwed into the screw hole of thenut 239 to fix the adjacent Fresnel lens fitting frames 211. Here, asthe Fresnel lens fitting part 216 of the Fresnel lens fitting frame 211is formed to be smaller in the diameter by the thickness of the pad 211,the adjacent pads 212 will be in contact with each other. Further, as astep part 217 is formed in the Fresnel lens fitting part 216 and thescrewed part 220 of the pad 212 is bent in conformity to the step part217, the screws 222 will not contact with each other. Further, in caseFresnel lens 214 expands or contracts, the Fresnel lens 214 will bestably held by the spring effect of the pad 212.

According to such embodiment, in the front surface part unit 201 of themultiscreen display, even when the lag of the image lights from theprojecting units is large, by the Fresnel lens fitting frame 211 of thelenticular lens fitting unit 210, the image light from the projectingunit can be prevented from being projected to a Fresnel lenscorresponding to another projecting unit and the image lights can beprevented from interfering with each other. Further, in the frontsurface part unit 201 of the multiscreen display, the lenticular lensfitting unit 230 can be removed by removing the bolts 235 (See FIGS. 33and 34) to the front surface side from the Fresnel lens fitting units210 as assembled, the Fresnel fitting units 210 can be disassembled oneby one by removing the bolts 238 and therefore such handlability as inmoving, conveying and installing them can be improved. Further, theFresnel lens 214 is individually fitted by the Fresnel lens fittingframe 211 formed of such light and tough material as an aluminum alloyand therefore the structure is lighter than in the conventional exampleshown in FIG. 62.

FIG. 37 is an elevation of the Fresnel lens fitting unit as assembled,showing a modification of the embodiment in FIG. 31. The same componentsas in the embodiment in FIG. 31 shall bear the same reference numeralsand shall not be explained.

In FIG. 37, the difference of this embodiment is that the locking piece243 of the pad (inside pad) 242 positioned on the adjacent surfaces ofthe Fresnel lens fitting units 241 as assembled is formed to be shorterin the width to the Fresnel lens 214 side than the locking piece 219 ofthe pad (outer peripheral side pad) 212 positioned on the outerperiphery. The other formations than this are the same as in theembodiment in FIG. 1.

FIG. 38 is a sectioned view of the Fresnel lens fitting unit 241 in FIG.37.

In FIG. 38, the width A1 of the locking piece 243 of the pad 242 on thesurface of the Fresnel lens fitting unit adjacent to the other Fresnellens fitting unit 241 is formed to be a width about half the width B1 ofthe locking piece 219 of the pad 212 on the outer periphery. Here, whenthe Fresnel lens fitting unit 241 is assembled, the adjacent pads 42will be in contact with each other and the pad 242 will not bend and,even if the locking piece 243 is short, the Fresnel lens 214 will beable to well prevent the Fresnel lens 214 from dropping.

According to such modification, the locking piece 243 between theadjacent Fresnel lenses 214 can be made inconspicuous and therefore ahigh impression can be given to the receivers.

FIG. 39 is a sectioned view of an essential part, showing the eighthembodiment of a multiscreen display of the present invention. The samecomponents as in FIG. 31 shall bear the same reference numerals andshall not be explained.

In FIG. 39, the Fresnel lens 246 of the Fresnel lens fitting unit 245has a groove part 247 formed in an intermediate position in front andrear of the side surface adjacent to the other Fresnel lens 246. The pad248 positioned on the surface adjacent to the Fresnel lens fitting units245 as assembled has the locking piece 249 formed in the positioncorresponding to the above mentioned groove part 247. The otherformations are the same as in the embodiment in FIG. 31.

According to such embodiments, the locking piece 249 between theadjacent Fresnel lenses 246 can be made more inconspicuous and has theeffects shown in the following.

FIG. 40 is an explanatory view showing the effects of such embodiments.FIG. 40(a) shows the locking piece and its peripheral part of theembodiment in FIG. 39. FIG. 40(b) shows the locking piece and itsperipheral part of the embodiment in FIG. 37.

The width D1 of the locking pieces 249 consisting of the laminated pads48 in this embodiment shown in FIG. 40(a) is set to be the same as thewidth E1 of the locking pieces 243 consisting of the laminated pads 242in the embodiment in FIG. 37 shown in FIG. 40(b). However, as shown inFIG. 40(a), as the groove part 247 is formed on the back surface siderather than on the surface of the Fresnel lens 246, the width C1produced when the image light is shielded by this groove part 247 willbe smaller than the width E1 by the locking pieces 243 shown in FIG.40(b). As a result, the boundary of the image can be made moreinconspicuous than in the embodiment in FIG. 37. In this case, thediffused reflection of the image light may be considered. However, inthis case, it will be able to be solved by black painting.

FIG. 41 is a sectioned view showing the essential part of themodification of the embodiment in FIG. 39.

In the embodiment in FIG. 41, the front surface side 253 rather than thegroove part 252 of the Fresnel lens 251 is formed to be longer by 1/2the thickness of the pad than the back surface side 254.

FIG. 42 is a sectioned view showing the Fresnel lens fitting unit asassembled of the modification in FIG. 41.

In FIG. 42, in the Fresnel lens fitting unit as assembled, the frontsurface sides 253 of the adjacent Fresnel lenses 251 are in contact witheach other and therefore the boundary of the Fresnel lenses 251 can bemade more inconspicuous. In case the projecting unit is off, the lockingpiece 249 of the pad 248 as seen from the semitransparent lenticularlens will be substantially invisible and a more favorable impressionwill be able to be given to the receivers.

FIG. 43 is an elevation of the Fresnel lens fitting unit, showing theninth embodiment of a multiscreen display of the present invention. Thesame components as in FIG. 31 shall bear the same reference numerals andshall not be explained.

In FIG. 43, two pads (inside pads) 262 are provided on each of the upperand lower adjacent surfaces of the Fresnel lens fitting unit 261. Also,two pads 263 are provided on each of the right and left adjacentsurfaces of the Fresnel lens fitting unit 261. The pads 262 and 263 areformed respectively to be somewhat smaller than 1/4 the outer peripheralpads (outer peripheral side pads) 212 and 213. The Fresnel lens 268 isfitted to the fitting part 267 of the Fresnel lens fitting frame 266.

FIG. 44 is an elevation showing the Fresnel lens fitting unit shown inFIG. 43 as assembled.

In FIG. 44, the locking pieces 264 of the pads 262 are provideddiscontinuously alternately between the upper and lower adjacent Fresnellens fitting units 261. In the same manner, the locking pieces 265 ofthe pads 263 are provided discontinuously alternately between the rightand left adjacent Fresnel lens fitting unit 261.

FIG. 45 is a sectioned view showing the Fresnel lens fitting unit shownin FIG. 43 as assembled.

The Fresnel lens fitting part 267 of the Fresnel lens fitting frame 266is formed to be smaller in the diameter than the outer periphery of theFresnel lens fitting frame 266 by 1/2 the thickness of the pad 262 andtherefore the pad 262 will be in contact with both of the adjacentFresnel lens fitting parts 267. Thereby, the width F1 of the shieldedpart of the Fresnel lens 268 by the locking piece 264 (locking piece265) can be made smaller than in the embodiment in FIG. 37 by half thethickness of the pad 262 (pad 263).

FIG. 46 is an elevation of the Fresnel lens fitting unit, showing thetenth embodiment of a multiscreen display of the present invention.

As shown in FIG. 46, groove parts are formed on the outer peripheries ofthe Fresnel lenses 315 of the Fresnel lens fitting units 311 and thelocking pieces 314, 315, 324 and 325 of the pads 312, 313, 322 and 323are inserted in these groove parts. The locking pieces 314 and 315 ofthe pads 312 and 313 positioned on the surfaces adjacent to each otherof the Fresnel lens fitting units 311 are formed to be shorter in thewidth to the Fresnel lens 316 side than the locking pieces 324 and 325of the pads 322 and 323 of the pad 12 positioned on the outer periphery.The Fresnel lens 316 and Fresnel lens fitting frame 317 in theoverlapping part of the corners of the Fresnel lens fitting units 311are cut off and a square through 318 is formed in this part.

FIG. 47 is a sectioned view showing the essential part of the embodimentin FIG. 46.

As shown in FIG. 47, a through hole 322 is formed in the positioncorresponding to the above mentioned through hole 318 of the lenticularlens 331. A pin 340 is inserted in the through holes 318 and 332 fromthe front surface side. A flange 341 of a diameter larger than of thethrough hole 332 is formed on the front surface side of the pin 340. Apartly cut-off ring-shaped fastening metal fixture is fitted to the partprojecting out of the back surface side of the Fresnel lens fittingframe 317 of the pin 340. The fastening metal fixture 342 will be fittedand fixed to the other end side of the pin. 340 by a rubber ring 343when the distance from the flange is well shortened. Thereby, thelenticular lens 331 will be pressed into contact with the Fresnel lens331.

According to such embodiment, there are the same effects as in theembodiment in FIG. 39, even in case the picture is formed to be large,the lenticular lens 331 will be able to be prevented from flexing and tobe pressed into contact with the Fresnel lens 316, the external lightwill be able to be prevented from being seen as partly reflected by theflexing of the lenticular lens and the image will be able to beprevented from being seen as distorted.

FIG. 48 is a perspective view showing the 11th embodiment of amultiscreen display of the present invention. The same components as inthe embodiments shown in FIGS. 31 to 38 shall bear the same referencenumerals and shall not be explained.

In FIG. 48, a wire 401 is fitted at one end to the central part on theupper side of the lenticular lens fitting frame 231, is fitted at theother end to the central part on the lower side of the lenticular lensfitting frame 231 and is stretched in the intermediate part to the frontsurface side of the lenticular lens 233 coinciding with the contactsurface of the adjacent pad 213 in the vertical direction.

A wire 402 is fitted at one end to the central part on the right side ofthe lenticular lens fitting frame 231, is fitted at the other end to thecentral part on the left side of the lenticular lens fitting frame 231and is stretched in the intermediate part to the front surface side ofthe lenticular lens 233 coinciding with the contact surface of theadjacent pad 212 in the horizontal direction.

FIG. 49 is a sectioned view of the wire fitting part in FIG. 48. Thesame components as in the embodiments shown in FIGS. 31 to 38 shall bearthe same reference numerals and shall not be explained.

As shown in this drawing, the lenticular lens fitting frame 231 of thelenticular lens fitting unit 230 is formed to be L-shaped with the frontsurface side directed outside and a reinforcing piece 232 is screwed andfixed to this part with screws 436. The wire 401 on one end side iswound and tied between the screw head of the screw 436 and thelenticular lens fitting frame 231 so as to be fitted to the central parton the upper side of the lenticular lens fitting frame 231. Though notillustrated, the wire 401 at the other end and the wire 402 at one endand the other end are fitted in the same manner as in the wire 401.

According to such embodiment, the same effects as in the embodiment inFIG. 46 can be obtained with the low cost wires 401 and 402. Here, thewires 401 and 402 are provided in the positions overlapping the pads 212and 213 and therefore can be made well inconspicuous.

FIG. 50 is a perspective view showing the 12th embodiment of amultiscreen display of the present invention.

In FIG. 50, the lenticular lens fitting unit 530 as having the Fresnelions fitting units 510 as assembled in three vertical rows and threehorizontal rows inserted from the back surface side is fitted to theFresnel lens fitting units 510. The Fresnel lens fitting unit 510 isfitted with the Fresnel lens 514 by the upper and lower pads 512 and theright and left pads 513 on the front surface side of the Fresnel lensfitting frame 211.

The lenticular lens 533 is divided into three lenticular lenses 541, 542and 543 by dividing tangential lines in the vertical directionoverlapping on the contact surfaces of the right and left pads 513 andis fitted on the Fresnel lens fitting unit 510 by using the lenticularlens fitting frame.

FIG. 51 is a sectioned view on line B--B of the lenticular lens shown inFIG. 50.

The lenticular lenses 541 and 542 are bonded with each other by abonding agent 551.

On the front surface side of the lenticular lenses 541 and 542, aplurality of groove parts 561 in the vertical direction are formed asarranged on the right and left. The bottom part of this groove part 561is formed to be an arcuate projection 562.

On the back surface side of the lenticular lenses 541 and 542, aplurality of arcuate projections 563 in the vertical direction areformed as arranged.

According to such embodiment, there are the same effects as in theembodiment in FIG. 31. In case the multiscreen is made for a largepicture, the lenticular lens will have to be formed as divided into aplurality so as to be die-formed. In such case, the joint (bonded partby the bonding agent 551) will be able to be made inconspicuous.

FIG. 52 is a side view showing a unit display in the 13th embodiment ofa multiscreen display of the present invention.

In this embodiment, a projecting unit 351 is inserted in an individualcabinet 352 and the same Fresnel lens fitting unit 210 as in FIG. 31 isfitted to the front surface side of this cabinet to form a single unitdisplay 360. In this embodiment, the unit displays 360 are assembledvertically and horizontally and further the lenticular lens fittingunits 230 in FIG. 31 are fitted. The connecting means for connecting andassembling a plurality of unit displays 360 vertically and horizontallymay be provided at least in either of the cabinet 352 and Fresnel lensfitting unit 210.

According to such embodiment, there are the same effects as in FIG. 31and, if the multiscreen display is assembled as in FIG. 52 and theoptical position such as focusing is finely adjusted in the factory, thefine adjustment and installing operation in the setting place will beable to be simplified.

By the way, in the embodiments shown in FIGS. 31 to 49 and FIG. 52, thefront surface part of the multiscreen display is formed of a total offour of Fresnel lens fitting units of two vertical rows and twohorizontal rows. However, the arrangement and number of the Fresnel lensfitting units may be separately set. For example, the front surface partmay be formed of a total of nine Fresnel lens fitting units of threevertical rows and three horizontal rows. In the embodiments shown inFIGS. 50 and 51, the front surface part of the multiscreen display isformed of a total of nine Fresnel lens fitting units of three verticalrows and three horizontal rows. rows. However, the arrangement andnumber of the Fresnel lens fitting units may be separately set. Forexample, the front surface part may be formed of a total of 16 Fresnellens fitting units of four vertical rows and four horizontal rows. Also,in the embodiments shown in FIG. 48, a wire is used as a linear memberto be stretched on the front surface side of the lenticular lens 33 butanother linear member such as a thread of synthetic fibers may be used.

According to the above described embodiments in FIGS. 31 to 52, evenwhen the lag of the image light from the projecting unit is large, theinterference with the image light will be able to be prevented and, incase the picture is made large, the handlability will be able to beimproved.

By the way, the present invention is not limited to only the abovedescribed embodiments but can be variously modified and worked withoutdeviating from the subject matter of the invention.

What is claimed is:
 1. A multiscreen display comprising:a plurality ofFresnel lenses; a plurality of Fresnel lens fitting frames, each Fresnellens being respectively fitted on a front side of a correspondingFresnel lens fitting frame; a plurality of projecting units respectivelyprojecting an image toward a back surface side of the Fresnel lenses;connecting means provided on a side surface of the Fresnel lens fittingframes for connecting the projection units; a lenticular lens; and alenticular lens fitting frame, the lenticular lens being fitted on afront surface side of the lenticular lens fitting frame, a plurality ofthe Fresnel lens fitting frames being inserted into a back surface sideof the lenticular lens fitting frame.
 2. A multiscreen displaycomprising:a plurality of Fresnel lenses; a plurality of Fresnel lensfitting frames, each Fresnel lens being respectively fitted on a frontside of a corresponding Fresnel lens fitting frame; a plurality ofprojecting units respectively projecting an image toward a back surfaceside of the Fresnel lenses; connecting means provided on a side surfaceof the Fresnel lens fitting frames for connecting the projecting units;pads having a locking piece formed on one end locking the Fresnel lensand having another end fitting the Fresnel lens to the Fresnel lensfitting frame when the Fresnel lens is fitted and fixed to the Fresnellens fitting frame; a lenticular lens; and a lenticular lens fittingframe, the lenticular lens being fitted on a front surface side of thelenticular lens fitting frame, a plurality of the Fresnel lens fittingframes being inserted into a back surface side of the lenticular lensfitting frame.
 3. A multiscreen display comprising:a plurality ofFresnel lenses; a plurality of Fresnel lens fitting frames, each Fresnellens being respectively fitted on a front side of a correspondingFresnel lens fitting frame; a plurality of projecting units respectivelyprojecting an image toward a back surface side of the Fresnel lenses;connecting means for connecting the projection units; outer peripheralside pads having a locking piece on one end locking the positionedFresnel lenses and having another end fitting the Fresnel lenses thatare fitted and fixed to outer peripheries of the Fresnel lens fittingframes; inside pads having a locking piece, the inside pads locking aFresnel lens to the Fresnel lens fitting frames when the Fresnel lens isfitted and fixed to adjacent surfaces of multiple Fresnel lens fittingframes to the Fresnel lens fitting frames, one side of the inside padsbeing shorter than the outer peripheral side pads; a lenticular lens;and a lenticular lens fitting frame, the lenticular lens being fitted ona front surface side of the lenticular lens fitting frame, a pluralityof the Fresnel lens fitting frames being inserted into a back surfaceside of the lenticular lens fitting frame.
 4. A multiscreen displaycomprising:a plurality Fresnel lenses; a plurality of Fresnel lensfitting frames, each Fresnel lens being respectively fitted on a frontside of a corresponding Fresnel lens fitting frame; a plurality ofprojecting units respectively projecting an image toward a back surfaceside of the Fresnel lenses; connecting means provided on the sidesurface of the Fresnel lens fitting frames for connecting the projectionunits; pads fabricated from a resilient member, each pad having alocking piece formed on one end locking the Fresnel lens and havinganother end fitting the Fresnel lens to the Fresnel lens fitting framewhen the Fresnel lens is fitted and fixed to the Fresnel lens fittingframe; a lenticular lens; and a lenticular lens fitting frame, thelenticular lens being fitted on a front surface side of the lenticularlens fitting frame, a plurality of the Fresnel lens fitting frames beinginserted into a back surface side of the lenticular lens fitting frame.5. A multiscreen display comprising:a plurality of Fresnel lenses havinga groove part formed on the periphery; a plurality of Fresnel lensfitting frames; a plurality of projecting units projecting an imagetoward a back surface side of the Fresnel lenses; connecting meansprovided on the side surface of the Fresnel lens fitting frames forconnecting the projecting units; pads having a locking piece formed onone end locking the groove part of the Fresnel lens and having anotherend fitting the Fresnel lens to the Fresnel lens fitting frame when theFresnel lens is fitted and fixed to the Fresnel lens fitting frame; alenticular lens; and a lenticular lens fitting frame, the lenticularlens being fitted on a front surface side of the lenticular lens fittingframe, a plurality of the Fresnel lens fitting frames being insertedinto a back surface side of the lenticular lens fitting frame.
 6. Amultiscreen display according to claim 5 characterized in that saidFlesnel lens is formed so that the outer periphery on the front surfaceside of said groove part is larger than the outer periphery on the backsurface side.
 7. A multiscreen display characterized by comprising:aplurality of Fresnel lenses, a Fresnel lens through hole beingpositioned at a point of intersection between four of the Fresnellenses; a plurality of Fresnel lens fitting frames, a Fresnel lensfitting frame through hole being positioned at a point of intersectionbetween four of the Fresnel lens fitting frames, each Fresnel lens beingrespectively fitted on a front side of a corresponding Fresnel lensfitting frame; a plurality of projecting units respectively projectingan image toward a back surface side of the Fresnel lenses; connectingmeans provided on a side surface of the Fresnel lens fitting frames forconnecting the projecting units; a lenticular lens, a lenticular lensthrough hole being positioned in a part of the lenticular lenscorresponding to the Fresnel lens through hole; a lenticular lensfitting frame, the lenticular lens being fitted on a front surface sideof the lenticular lens fitting frame, a plurality of the Fresnel lensfitting frames being inserted into the lenticular lens fitting frameinto a back surface side of the lenticular lens fitting frame; a pinhaving a flange locking on a periphery of the lenticular lens throughhole, the pin having a shaft extending through the lenticular lensthrough hole, the Fresnel lens through hole and the Fresnel lens fittingframe through hole, the pin projecting on the back surface side of theFresnel lens fitting frames; and a pin fixing member having an outsidediameter larger than a diameter of the Fresnel lens fitting framethrough hole, the pin fixing member being fitted and fixed to the pinprojecting toward the back surface side of the Fresnel lens fittingframes.
 8. A multiscreen display comprising:a plurality of Fresnellenses; a plurality of Fresnel lens fitting frames, each Fresnel lensbeing respectively fitted on a front side of a corresponding Fresnellens fitting frame; a plurality of projecting units respectivelyprojecting an image toward a back surface side of the Fresnel lenses;connecting means provided on a side surface of the Fresnel lens fittingframes for connecting the projecting units; pads having a locking pieceformed on one end and having another end fitting the Fresnel lens to theFresnel lens fitting frame when the Fresnel lens is fitted and fixed tothe Fresnel lens fitting frame; a lenticular lens; and a lenticular lensfitting frame, the lenticular lens being fitted on a front surface sideof the lenticular lens fitting frame, a plurality of the Fresnel lensfitting frames being inserted into a back surface side of the lenticularlens fitting frame; and linear members fixed to an outer periphery ofthe lenticular lens fitting frame, respectively, the linear membersbeing stretched across the lenticular lens in a position overlapping thepads on the front surface side of the lenticular lens.
 9. A multiscreendisplay comprising:a plurality of Fresnel lenses; a plurality of Fresnellens fitting frames, each Fresnel lens being respectively fitted on afront side of a corresponding Fresnel lens fitting frame; a plurality ofprojecting units projecting an image toward a back surface side of theFresnel lenses; connecting means provided on the side surface of theFresnel lens fitting frames for connecting the projecting units; rightand left pads each having a locking piece formed on one end of the padand each having another end fitting the Fresnel lenses to the Fresnellens fitting frames when the Fresnel lenses are fitted and fixed on theright and left sides of the Fresnel lens fitting frames; a plurality oflenticular lenses of a vertical stripe form, the lenticular lensesdiffusing image lights through the Fresnel lenses on the right and leftsides of the Fresnel lens fitting frames, the lenticular lenses beingdivided by dividing lines in a vertical direction, the dividing linesoverlapping with the right and left pads; a bonding agent bonding aplurality of the lenticular lenses; and a lenticular lens fitting frame,the lenticular lenses being fitted on a front surface side of thelenticular lens fitting frame, a plurality of the Fresnel lens fittingframes being inserted into a back surface side of the lenticular lensfitting frame.
 10. A multiscreen display characterized by comprising:aplurality of Fresnel lenses; a plurality of projecting unitsrespectively projecting image lights to a plurality of said Fresnellenses; a plurality of cabinets opened on the front surface side andrespectively containing inside a plurality of said projecting units; aplurality of Fresnel lens fitting frames formed to be frame-shaped andhaving a plurality of said Fresnel lenses respectively fitted on thefront surface side and the front surface sides of a plurality of saidcabinets respectively fitted on the back surface side; a connectingmeans provided on at least either of a plurality of the cabinet and aplurality of the Fresnel lens fitting frames and connecting andassembling with one another a plurality of the cabinets having aplurality of the Fresnel lens fitting frames respectively fitted; alenticular lens; and a lenticular lens fitting frame formed to beframe-shaped, having said lenticular lens fitted on the front surfaceside and having a plurality of said assembled Fresnel lens fittingframes inserted from the back surface side.